Titan's allure is many-fold: It has a thick atmosphere—the only moon in the solar system to have one—stable liquid on its surface, and a landscape of lakes, seas, and dunes. So it's no surprise that astronomers are keeping an eye on Saturn's largest satellite.

Scientists now say the Huygens probe that landed on Titan in 2005 did so with a bounce, slide, and wobble, yielding new clues about its Earthlike terrain.